/* 基础设计变量 · 借鉴「易经·金石录」主题，做网页精简版 */
:root {
  /* 字体 */
  --font-text: "Songti SC", "STSong", serif;
  --font-heading: "Kaiti SC", "STKaiti", serif;
  --font-ui: -apple-system, BlinkMacSystemFont, "PingFang SC", system-ui,
    sans-serif;

  /* 间距与圆角（洛书九宫简化版） */
  --gap-xs: 4px;
  --gap-sm: 8px;
  --gap-md: 12px;
  --gap-lg: 20px;
  --gap-xl: 32px;

  --radius-s: 4px;
  --radius-m: 8px;
  --radius-l: 14px;
  --radius-xl: 18px;

  /* 暗色基底（漆器青铜） */
  --bg-primary: #19181a;
  --bg-secondary: #141316;
  --bg-tertiary: #0f0e11;

  /* 墨色（文字） */
  --ink-100: #e5e5df;
  --ink-80: #c3c0b8;
  --ink-60: #a3a09a;
  --ink-40: #7b7974;
  --ink-20: #494846;

  /* 金石强调色 */
  --gold: #c9a554;
  --gold-soft: rgba(201, 165, 84, 0.18);
  --cinnabar: #c46b6b;

  /* 卡片与边框 */
  --card-bg: radial-gradient(circle at top, #1f2933, #05060b 60%);
  --card-border: rgba(148, 163, 184, 0.5);

  /* 动效 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --t-fast: 0.18s var(--ease-out);
  --t-med: 0.28s var(--ease-smooth);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-ui);
  background-color: var(--bg-primary);
  color: var(--ink-100);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--gap-md);
}

.app-header {
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
  background: radial-gradient(circle at top left, #222433, #05060b 55%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--gap-lg) var(--gap-md);
  gap: var(--gap-md);
}

.app-header h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.4rem;
}

.subtitle {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--ink-80);
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid rgba(148, 163, 184, 0.6);
  color: var(--ink-80);
}

.app-main {
  flex: 1;
  padding: var(--gap-lg) 0 var(--gap-xl);
}

.intro-card,
.test-section,
.result-section {
  background: var(--card-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--card-border);
  box-shadow: 0 18px 45px rgba(5, 6, 11, 0.9);
  padding: var(--gap-lg) var(--gap-md) calc(var(--gap-lg) - 4px);
  margin-bottom: var(--gap-lg);
}

.intro-card h2,
.test-section h2,
.result-section h2 {
  margin-top: 0;
  margin-bottom: var(--gap-xs);
  font-size: 1.3rem;
  font-family: var(--font-heading);
}

.subheading {
  margin: 4px 0 4px;
  font-size: 0.95rem;
  font-family: var(--font-heading);
  color: var(--ink-80);
}

.intro-card ul {
  margin: 0 0 var(--gap-md);
  padding-left: 20px;
  color: var(--ink-80);
  font-size: 0.95rem;
}

.intro-card li + li {
  margin-top: 4px;
}

.mode-toggle {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: radial-gradient(circle at top left, #050814, #05060b 80%);
  margin-bottom: var(--gap-sm);
}

.mode-label {
  font-size: 0.82rem;
  color: var(--ink-80);
  margin-right: 4px;
}

.mode-option {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  color: var(--ink-80);
  cursor: pointer;
}

.mode-option input {
  width: 12px;
  height: 12px;
  accent-color: var(--gold);
}

.basic-info-card {
  margin-top: var(--gap-sm);
  margin-bottom: var(--gap-md);
  padding: var(--gap-md) var(--gap-md) var(--gap-sm);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: radial-gradient(circle at top left, #050814, #05060b 75%);
  box-shadow: 0 14px 34px rgba(5, 6, 11, 0.85);
  position: relative;
  overflow: hidden;
}

.basic-info-card h3 {
  margin: 0 0 6px;
  font-size: 0.98rem;
  font-family: var(--font-heading);
  display: flex;
  align-items: center;
  gap: 6px;
}

.basic-info-card h3::before {
  content: "";
  width: 4px;
  height: 14px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--gold), #f5d27a);
}

.basic-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--gap-sm);
  margin-top: 4px;
  margin-bottom: var(--gap-xs);
}

.basic-info-card .field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.basic-info-card label {
  font-size: 0.8rem;
  color: var(--ink-80);
}

.basic-info-card input,
.basic-info-card select {
  font-size: 0.86rem;
  padding: 6px 9px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(9, 10, 16, 0.95);
  color: var(--ink-100);
  outline: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast),
    background-color var(--t-fast), transform var(--t-fast);
  width: 100%;
  box-sizing: border-box;
  -webkit-appearance: none;
  appearance: none;
}

.basic-info-card input::placeholder {
  color: var(--ink-60);
}

/* 为下拉选择框增加与输入框统一的箭头视觉 */
.basic-info-card select {
  padding-right: 28px;
  background-image: linear-gradient(
      45deg,
      transparent 0,
      transparent 50%,
      var(--ink-60) 50%,
      var(--ink-60) 100%
    ),
    linear-gradient(
      -45deg,
      transparent 0,
      transparent 50%,
      var(--ink-60) 50%,
      var(--ink-60) 100%
    );
  background-position: right 12px center, right 6px center;
  background-repeat: no-repeat;
  background-size: 6px 6px, 6px 6px;
}

.basic-info-card input:focus,
.basic-info-card select:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 1px rgba(201, 165, 84, 0.4);
  background: rgba(9, 10, 16, 0.98);
  transform: translateY(-0.5px);
}

.intro-card .primary-button {
  margin-top: var(--gap-sm);
}

.primary-button,
.secondary-button {
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all var(--t-fast);
}

.primary-button {
  background: linear-gradient(135deg, var(--gold), #f5d27a);
  color: #05060b;
  box-shadow: 0 10px 26px rgba(201, 165, 84, 0.55);
  font-weight: 600;
}

.primary-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(201, 165, 84, 0.7);
}

.secondary-button {
  background: rgba(9, 10, 16, 0.9);
  color: var(--ink-80);
  border: 1px solid rgba(148, 163, 184, 0.7);
}

.secondary-button:hover {
  background: rgba(201, 165, 84, 0.12);
}

.muted {
  color: var(--ink-60);
  font-size: 0.9rem;
  margin-top: 4px;
}

.hidden {
  display: none;
}

.test-header {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--gap-sm);
}

.progress-wrapper {
  flex: 1 1 220px;
  max-width: 360px;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--ink-60);
  margin-bottom: 4px;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background-color: rgba(55, 65, 81, 0.75);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--gold), #f5d27a);
  border-radius: 999px;
  transition: width 0.18s ease-out;
}

.questions-container {
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  max-height: 460px;
  overflow-y: auto;
  padding-right: 4px;
  margin-top: 4px;
  margin-bottom: var(--gap-sm);
}

.question-card {
  border-radius: var(--radius-l);
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: radial-gradient(circle at top left, #171923, #05060b 70%);
  padding: 10px 10px 8px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast),
    transform var(--t-fast);
}

.question-card:hover {
  border-color: rgba(201, 165, 84, 0.6);
  box-shadow: 0 10px 26px rgba(5, 6, 11, 0.85);
  transform: translateY(-1px);
}

.question-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.question-text {
  font-size: 0.9rem;
  color: var(--ink-100);
}

.question-id {
  font-size: 0.8rem;
  color: var(--ink-60);
}

.scale-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.scale-label {
  font-size: 0.8rem;
  color: #9ca3af;
  white-space: nowrap;
}

.scale-options {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 4px;
  flex: 1;
}

.scale-option {
  position: relative;
}

.scale-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.scale-option label {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  font-size: 0.8rem;
  color: #e5e7eb;
  cursor: pointer;
  background: rgba(15, 23, 42, 0.9);
  transition: all 0.15s ease-out;
}

.scale-option input:checked + label {
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  border-color: transparent;
  color: #f9fafb;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.6);
  transform: translateY(-1px);
}

.controls {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 8px;
}

.controls button {
  flex: 1;
}

.result-summary {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.student-info-summary {
  margin-top: 8px;
  margin-bottom: 8px;
}

.student-info-summary .result-card {
  margin-bottom: 0;
}

.ai-panel {
  margin-top: var(--gap-sm);
  padding: var(--gap-sm) var(--gap-sm);
  border-radius: var(--radius-l);
  border: 1px dashed rgba(148, 163, 184, 0.6);
  background: radial-gradient(circle at top, #05060b, #05060b 65%);
}

.ai-panel h3 {
  margin: 0 0 4px;
  font-size: 1rem;
  font-family: var(--font-heading);
}

.ai-content {
  margin-top: 4px;
  font-size: 0.9rem;
  color: var(--ink-80);
  white-space: pre-wrap;
  line-height: 1.6;
}

.result-card {
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: radial-gradient(circle at top, #020617, #020617 55%);
  padding: 10px 10px 8px;
}

.result-card h3 {
  margin: 0 0 6px;
  font-size: 0.95rem;
}

.result-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.86rem;
  color: #e5e7eb;
}

.result-list li + li {
  margin-top: 2px;
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.6);
  color: #e5e7eb;
  margin-right: 4px;
}

.app-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.4);
  padding: 10px 0 12px;
  background: #020617;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #9ca3af;
}

.footer-meta {
  opacity: 0.85;
}

@media (max-width: 640px) {
  .header-inner {
    align-items: flex-start;
  }

  .app-header h1 {
    font-size: 1.2rem;
  }

  .questions-container {
    max-height: 430px;
  }

  .controls {
    flex-direction: column;
  }
}